Počet záznamů: 1
Hydrate failure in ITZ governs concrete strength: A micro-to-macro validated engineering mechanics model
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SYSNO ASEP 0482301 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Hydrate failure in ITZ governs concrete strength: A micro-to-macro validated engineering mechanics model Tvůrce(i) Königsberger, M. (AT)
Hlobil, Michal (UTAM-F) RID, SAI, ORCID
Delsaute, B. (BZ)
Staquet, S. (BE)
Hellmich, C. (AT)
Pichler, B. (AT)Celkový počet autorů 6 Zdroj.dok. Cement and Concrete Research. - : Elsevier - ISSN 0008-8846
Roč. 103, č. 1 (2018), s. 77-94Poč.str. 18 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova compressive strength ; micromechanics ; cement paste ; concrete ; modeling Vědní obor RIV JM - Inženýrské stavitelství Obor OECD Construction engineering, Municipal and structural engineering Institucionální podpora UTAM-F - RVO:68378297 UT WOS 000423245700006 EID SCOPUS 85033576675 DOI 10.1016/j.cemconres.2017.10.002 Anotace Ever since the early days of Féret (1892) and Abrams (1919), concrete research has targeted at relating concrete composition to uniaxial compressive strength. While these activities were mainly characterized by empirical fitting functions, we here take a more fundamental approach based on continuum micromechanics. The loading applied at the concrete level, is first concentrated (“downscaled”) to maximum stresses related to cement paste volumes which are directly adjacent to the aggregates, i.e. to the interfacial transition zones (ITZ). These maximum stresses are further “downscaled” to the micron-sized hydrates, in terms of higher-order stress averages. The latter enter a Drucker-Prager failure criterion with material constants derived from nanoindentation tests. The model is successfully validated across the hydrate-to-concrete scales. Strength magnitude is governed by ITZ stress concentrations, and the water-to-cement ratio is its dominant mixture design parameter. Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2019 Elektronická adresa https://doi.org/10.1016/j.cemconres.2017.10.002
Počet záznamů: 1